Need more detailed explanation of certain periodic maintenance tasks

[Tylenator]

This past season was my first with the 2020 Yamaha 210 FSH Sport. I've completed most of the 50-ish periodic maintenance tasks outlined in the service manual, but there are still a few that are unclear due to vague diagrams and descriptions. I've listed the tasks I'm unsure about below, along with their corresponding page numbers from the SERVICE manual. If anyone can provide more detailed explanations than what’s in the manual, I’d greatly appreciate it.

Once I fully understand the maintenance items, I plan to create a how-to video to help others in the future. While I’ve found several Yamaha maintenance videos on YouTube, none cover the full list of periodic maintenance tasks from the manual. Some do touch on a few of the items I’ve listed, but they’re not detailed enough for someone new to jet boats.

As people respond with feedback, I’ll update the text below. Red verbiage will be remaining questions.

Edit: I updated the verbiage of the maintenance tasks to match what is in the manual.

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• Fuel line check (Check for damage, and check connections and tightening of clamps) (3-4)
  • Follow the fuel filling hoses and check they aren't kinked or missing clamps etc.
• High-pressure fuel hoses (Check connections and exterior, and check for leakage) (4-1)
  • The hoses go from the fuel tank to the engines.
• Rubbing coupling check (Check for looseness and noise) (3-16)
  • Remove the rubber coupling cover, over the couplings that go from the engines to the drive shafts. Wiggle the shaft to see if it rattles. If it rattles the service manual says to, "remove the engine and check the coupling."
• Air intake hose check (Check for damage and check connections)(3-14)
  • Simple inspect the hoses around the air intake in the engine compartment for issues.
• Breather hose check (Check for damage and check connections) (3-14)
  • This is one of the hoses that connects to the top of the gas tank. Remove the gas tank compartment cover and check the connection. The hose routes over to the air vent that's on the side of the boat, next to the gas fill cap. Remove the cover to the vent and check that no bugs have made a home there.
• Cooling water hose check (Check for damage, and check connections) (3-16)
  • This is all the cooling hoses. Water from the pumps to the engines, exhaust, and pissers. Make sure you don't find any missing clamps and no leaks.
• Exhaust system check (Check exhaust hoses and water locks for leakage, and check clamps at connections) (3-10)
  • Remove the clean out tray by the clean out hatches and inspect the connections under there.
• Engine anode check (Check for corrosion) (3-14)
  • I know where these are but I'm struggling to get my socket on them. Does anyone have tips on doing this without removing the manifold? I have a long socket extension and a joint socket, but still can't get the socket on the bolt.
• Intermediate housing lubrication (3-18)
  • There is a zerk fitting on the pump, or attached to a hose that is attached to the top back of the engines (varies by boat). Attach a grease gun and add no more than 6-8cc of Yamalube Marine Grease, assuming this is a minimum of a 100 hour service. If it gets firm in resisting DO NOT FORCE IT.
• Throttle cable check (Check connections and exterior, and lubricate) (3-10)
  • Remove binnacle and lubricate the throttle connections and other areas specified in the service manual diagram with Yamalube Marine Grease.
• Shift cable and shift gate check (Check connections and exterior, and lubricate) (3-10)
  • The gates are the "buckets" that move up and down to divert water when you move your throttle. Check and lubricate all gate connections with Yamalube Marine Grease in the locations specified in the service manual diagram. Pull back the rubber cover on shift cables and grease, and slide the cover back on.
• Jet thrust nozzle check (Check movement and lubricate) (3-18)
  • The jet thrust nozzles are the portion of the jet pump that moves left/right when you steer. To lubricate these, disconnect the steering cables, remove the nozzle, and grease the nozzle's pivot points with Yamalube Marine Grease. Reassemble.
• Steering cable check (Check connections and exterior, and lubricate) (3-9)
  • Pull back the cover on the steering cable that connects to the jet thrust nozzles, grease with Yamalube Marine Grease, and put the covers back.
• Impeller duct check (Check movement and lubricate) (3-17)
  • Remove the jet thrust nozzle assembly. Remove the impeller duct cap. Check that there is no water intrusion. Replace the cap's o-ring. Grease the cap with Epnoc grease AP#0 (it doesn't specify how much grease to add). Re-install cap. Re-install jet thrust assembly.

 

[Julian]

Moved this to General Discussion forum as this is generic to most boats and will get more visibility in General discussion.

 

[FSH 210 Sport]

This past season was my first with the 2020 Yamaha 210 FSH Sport. I've completed most of the 50-ish periodic maintenance tasks outlined in the service manual, but there are still a few that are unclear due to vague diagrams and descriptions. I've listed the tasks I'm unsure about below, along with their corresponding page numbers from the manual. If anyone can provide more detailed explanations than what’s in the manual, I’d greatly appreciate it.

Once I fully understand the maintenance items, I plan to create a how-to video to help others in the future. While I’ve found several Yamaha maintenance videos on YouTube, none cover the full list of periodic maintenance tasks from the manual. Some do touch on a few of the items I’ve listed, but they’re not detailed enough for someone new to jet boats.

As people respond with feedback, I’ll update the original post, removing my red questions and replacing them with answers in green.

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• Check fuel hoses clamps canister and check valve (3-4)
  • Where is this? What am I checking?
• Check connections and leakage of high-pressure fuel hoses (4-1)
  • Where are the hoses?
• Check looseness and noise of rubber couplings (3-16)
  • What couplings? What noise am I looking for? How loose is too loose?
• Check intakes hoses and breather hoses for damage and connection (3-14)
  • Where are the hoses?
• Check for damage and connections for cooling water hoses and cooling water pilot outlet hoses (3-16)
  • Is this referring to the hoses that carry water to cool the engine?
• Check exhaust hoses and water locks and resonators for leaks and clamps connections (3-10)
  • Huh?
• Check engine anodes (3-14)
  • I know where these are but I'm struggling to get my socket on them. Does anyone have tips on doing this without removing the manifold? I'm using a long socket extension and a joint socket.
• Lubricate intermediate housing (3-18)
  • Where is this located? Where do you lubricate it and how?
• Check throttle cables connection and lubricate (3-10)
  • What about the connection are we checking? Where and how are we lubricating?
• Check shift cables connections and lubricate (shift gate end) (3-10)
  • What about the connection are we checking? Where and how are we lubricating?
• Check movement and lubricate jet thrust nozzles (3-18)
  • Is this referring to the "bucket" that diverts the water stream? Where and how are we lubricating?
• Check connection and lubricate steering cables (3-9)
  • What about the connection are we checking? Where and how are we lubricating?
• Check and lubricate impeller ducts (3-17)
  • What are we checking? Where and how are we lubricating?

You will need to take clear pictures of the service manual pages and post them with your questions because everyone will need to see what you’re talking about because they do not have your service manual.

 

[Julian]

I'll take a quick shot at this - others can weigh in more

• Check fuel hoses clamps canister and check valve (3-4)
  • Where is this? What am I checking? ANSWER: under the seat on the fuel filling side, follow the fuel filling hoses and check they aren't kinked or missing clamps etc
• Check connections and leakage of high-pressure fuel hoses (4-1)
  • Where are the hoses? ANSWER: from the fuel tank to the engines-if these are leaking you'll smell gas in the engine bay. I install a fume detector so I'll know if this ever happens (link on how to do this in my signature-if you don't see my signature turn your phone on its side)
• Check looseness and noise of rubber couplings (3-16)
  • What couplings? What noise am I looking for? How loose is too loose? ANSWER: these are the couplings from the engines to the drive shafts. Hard to say what the right noise is....do they sound normal? LOL
• Check intakes hoses and breather hoses for damage and connection (3-14)
  • Where are the hoses? ANSWER: follow the blower hoses and make sure they are all connected to the outide intake points -look up a schematic if you don't know where they go.
• Check for damage and connections for cooling water hoses and cooling water pilot outlet hoses (3-16)
  • Is this referring to the hoses that carry water to cool the engine? ANSWER: this is all the cooling hoses. Water from the pumps to the engines and exhaust. Make sure you don't find any missing worm clamps and no leaks.
• Check exhaust hoses and water locks and resonators for leaks and clamps connections (3-10)
  • Huh? ANSWER: this is a dup of the last question, but requires you remove the clean out tray by the clean out hatches in order to inspect the connections under there.
• Check engine anodes (3-14)
  • I know where these are but I'm struggling to get my socket on them. Does anyone have tips on doing this without removing the manifold? I'm using a long socket extension and a joint socket. ANSWER: don't have a suggestion...
• Lubricate intermediate housing (3-18)
  • Where is this located? Where do you lubricate it and how? ANSWER: there is a zerk fitting on the pump, or attached to a hose that is attached to the top back of the engines (varies by boat). Attach a grease gun and add 3-4 pumps of grease - if it gets firm in resisting DO NOT FORCE IT.
• Check throttle cables connection and lubricate (3-10)
  • What about the connection are we checking? Where and how are we lubricating? ANSWER-Remove binnacle and lubricate the throttle connections and the gate connections. Also lube the gate connections at the pump (pull back the rubber cover, grease, and slide the cover back)
• Check shift cables connections and lubricate (shift gate end) (3-10)
  • What about the connection are we checking? Where and how are we lubricating? ANSWER (same as above)
• Check movement and lubricate jet thrust nozzles (3-18)
  • Is this referring to the "bucket" that diverts the water stream? Where and how are we lubricating? (Same as above)
• Check connection and lubricate steering cables (3-9)
  • What about the connection are we checking? Where and how are we lubricating? (same as above)
• Check and lubricate impeller ducts (3-17)
  • What are we checking? Where and how are we lubricating? ANSWER - the only impeller lube points Im aware of are the intermediate housing zerk fitting, and the nozzle cone. Many change to cone lube to a slurry...search for Lube Nozzle cone and you should find answers on how to.

 

[steelhorse454]

Seems like the simple answer here is.....Have some screwdrivers, pliers, etc. handy and just look around your boat inside the engine bay, around the jet pump, under seats, etc. etc. Tighten or attempt to tighten anything that looks loose or suspect. This is also a good way to familiarize yourself with your boat. I do this periodically myself being proactive before something lets loose.

 

[qwikkotatx]

For the linkages, the manual says to use grease but there are no zerk fittings. Applying grease on the outside of the rod ends and other similar joints seems pretty pointless. I have used spray lube there a time or 2. What is the proper method?

 

[drewkaree]

I've listed the tasks I'm unsure about below, along with their corresponding page numbers from the manual.

Are you in possession of the manual? @Julian is doing yeoman's work here, but DO realize, he and 99% of us are going to have to give you generic info based on OUR boats, since we would have no knowledge of a manual for a boat we don't own - the page indicators are leading me to wonder why not post screenshots, so we can highlight or annotate.

Help us help you. Extra homework tracking down your boat's info isn't going to be the most efficient process for getting specific information, so you're going to get generic responses that you'll still have to suss out, and it seems some of these items are easily seen on the pages that should accompany the bullet points

A example, to clarify:

Lubricate intermediate housing (3-18)

Where is this located? Where do you lubricate it and how?"

On that page, there's a diagram. We can easily circle the area you need to look around, and probably highlight the exact item. The manuals also tend to label the items, and identify them via numbers/letters/etc. Make this easier, for useful assistance, and post a VISUAL of the page from the manual.

On this point, @Julian has the perfect answer, but I'm betting it didn't clarify anything for you. That's the textbook answer, but as you can see, it necessarily needs to be somewhat vague, because these boats are different from year to year, and model to model.

Toss those pics and screenshots up, and we should be able to get you sorted with specifics to your situation

 

[FSH 210 Sport]

Are you in possession of the manual? @Julian is doing yeoman's work here, but DO realize, he and 99% of us are going to have to give you generic info based on OUR boats, since we would have no knowledge of a manual for a boat we don't own - the page indicators are leading me to wonder why not post screenshots, so we can highlight or annotate.

Help us help you. Extra homework tracking down your boat's info isn't going to be the most efficient process for getting specific information, so you're going to get generic responses that you'll still have to suss out, and it seems some of these items are easily seen on the pages that should accompany the bullet points

A example, to clarify:



On that page, there's a diagram. We can easily circle the area you need to look around, and probably highlight the exact item. The manuals also tend to label the items, and identify them via numbers/letters/etc. Make this easier, for useful assistance, and post a VISUAL of the page from the manual.

On this point, @Julian has the perfect answer, but I'm betting it didn't clarify anything for you. That's the textbook answer, but as you can see, it necessarily needs to be somewhat vague, because these boats are different from year to year, and model to model.

Toss those pics and screenshots up, and we should be able to get you sorted with specifics to your situation

Actually, in reference to the intermediate bearing and greasing, the service manual and the 2020 210 FSH owners manual page 117 is very specific. The first greasing should be done at 10 hours, subsequent greasing at 6 months or 100 hours of use. Was the first greasing done at 10 hours?



I bought a 60 cc irrigation syringe off of Amazon so I could measure how many cc’s of grease each full stroke of my grease gun put out. First I trimmed the nozzle of the syringe such I could thread a grease zerk into it, removed the the zerk and put a dollop of marine grease into the syringe and pushed the plunger down to force this grease out and eliminate any air. Screwed the zerk back in and used my grease gun to push grease in until the plunger lined up with 0 mark, then started pumping grease in with full strokes of the handle and keeping count until I got to 35 cc’s. Put the grease gun on the first intermediate bearing zerk and began pumping grease into it, SLOWLY as the owners manual states, and, as @Julian suggested, was cognizant of any increase in the effort required to pump the grease in, I never felt any. Once I got to the number of strokes I had counted off to get to 35 cc’s I stopped, removed the grease gun, wiped off the zerk and repeated the procedure on the other housing.

I started this thread a while back that gives a more in depth look at the intermediate assembly. Big thanks to @madtom and his thread on intermediate bearings that helped me to get to the procedure I use now.

Thread 'Jet Pump / Intermediate bearing / Maintenance / Rebuild'

Jan 9, 2026

So I was doing my annual grease cone / jet pump maintenance and found some wear that is going to have to be dealt with. Keep in mind I have 750 hours on these shafts.

Back in June when I pulled the pumps to test a set of impellers I found some unusual wear marks on the starboard shaft where it interfaces with the intermediate shaft / coupler.

I thought I had a higher res picture of the starboard shaft back in August, but this is about as good as it gets.

This first pic is how it looked when I pulled it out, had some grease on the shaft…




This was after I had wiped it off...

• FSH 210 Sport
• Replies: 18
• Forum: General Discussion

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[Tylenator]

You will need to take clear pictures of the service manual pages and post them with your questions because everyone will need to see what you’re talking about because they do not have your service manual

99% of us are going to have to give you generic info based on OUR boats, since we would have no knowledge of a manual for a boat we don't own - the page indicators are leading me to wonder why not post screenshots, so we can highlight or annotate. Help us help you. Extra homework tracking down your boat's info isn't going to be the most efficient process for getting specific information, so you're going to get generic responses that you'll still have to suss out.

Toss those pics and screenshots up, and we should be able to get you sorted with specifics to your situation

I’ll take photos of the specific parts of the manual I’m referencing and update the post tonight. Apologies, I wasn’t trying to be difficult. I posted this in the FSH forum because the audience there would have the specific knowledge, but the post was moved.

 

[qwikkotatx]

So 35 cc's for just the first grease application at 10 hours? After that it's a much smaller amount.

 

[Tylenator]

For the linkages, the manual says to use grease but there are no zerk fittings. Applying grease on the outside of the rod ends and other similar joints seems pretty pointless. I have used spray lube there a time or 2. What is the proper method?

Ok yea, I feel validated now for asking.

I found a video where a guy pressurized a hose to push gear oil up into the throttle cables. Makes sense, but, doesn't really seem like an official way to do it?

 

[Tylenator]

So 35 cc's for just the first grease application at 10 hours? After that it's a much smaller amount.

What you're asking is how I interpret it - but that's also why I asked - it's confusing!

I have the service manual, I've read it, and I've reviewed the diagrams. However, it's still confusing in places. It's frustrating that some people (not you) assume that since I'm asking questions that there are diagrams for, I didn't take the time to look at the diagrams or read the text in the first place. That's simply not true.

 

[qwikkotatx]

What you're asking is how I interpret it - but that's also why I asked - it's confusing!

I have the service manual, I've read it, and I've reviewed the diagrams. However, it's still confusing in places. It's frustrating that some people (not you) assume that since I'm asking questions that there are diagrams for, I didn't take the time to look at the diagrams or read the text in the first place. That's simply not true.

You know I bet the difference is because the hoses are empty when they assemble the boats.

 

[Julian]

Ok yea, I feel validated now for asking.

I found a video where a guy pressurized a hose to push gear oil up into the throttle cables. Makes sense, but, doesn't really seem like an official way to do it?

For the linkages it is simply keeping the jointed and cable ends greased. No rocket science to this, grease them as often as you can. The more you grease them the less chance of water intrusion. Pull back the rubber "end covers" to the cables apply a small amount of grease and slide the covers back on. For the other joints, just grease them to ensure the least friction possible.

As for moving your post, I did that, as these sorts of engine maintenance questions have very little model specific variance, and posts buried in model specific forums get far less attention here. I'm happy to move it back if you'd like to see.

 

[Tylenator]

• Check intakes hoses and breather hoses for damage and connection (3-14)
  • Where are the hoses? ANSWER: follow the blower hoses and make sure they are all connected to the outide intake points -look up a schematic if you don't know where they go.

Breather hose, not blower hose. I found it...

This is one of the hoses that connects to the top of the gas tank. Remove the gas tank compartment cover and check the connection. The hose routes over to the air vent that's on the side of the boat, next to the gas fill cap. Remove the cover to the vent and check that no bugs have made a home there.

 

[Tylenator]

I've updated the maintenance tasks that still have lingering questions. I still plan to post diagram photos to support the information. Just haven't gotten to it yet.