Maintenance Question

[jr]

I have a 2000 Yami 115 that I bought 5 years ago. Probably have put 250 hours on it. Every year I have it winterized by a boat yard. Change plugs every spring after I burn off all the fogging oil. Changed the impeller every other year. Other than the old water in the gas issues it has run fine. My question is what else should I be having changed. Water pump? Fuel pump? Carb rebuild? I don't want to waste money but I don't want any hassles either. I would appreciate any thoughts

Thanks

 

[DaleH]

... 2000 Yami 115 ... 250 hours on it ... Changed the impeller every other year.

My question is what else should I be having changed. Water pump? Fuel pump? Carb rebuild? I don't want to waste money but I don't want any hassles either.

Your dealer should be replacing the waterpump when they do the impeller, so check on that. The impeller is included in the rebuild kit which typically includes a housing, wear plate, O-Rings, impeller, and drive key. Different brands/HPs may have an extra or fewer parts; like maybe a water tube bushing or grommet.

With the LOW hours you're doing, I'd go to every 3-seasons on the L/U-waterpump service.

Make sure you change your water filter in the fuel line eery season, plus grease up all zirk fittings with a good marine blue-colored waterproof synthetic grease, of which Bombardier 'Triple Guard' is the best and cheapest to buy. The Jap motor brands sell the SAME product for 2-3X times the price of the US-branded grease.

 

[Megabyte]

Low pressure fuel pumps every 3 years.
Thermostats and poppit every other year (I do mine on the opposite year of the water pump).

 

[DaleH]

Low pressure fuel pumps every 3 years.
Thermostats and poppit every other year (I do mine on the opposite year of the water pump).

I think he has a 2-stroke and if so, fugheddabout replacing any fuel pump until it needs it.

For that HP motor and usage history, I'd still do the waterpump/impeller/t-stat/poppit service every 3-years.

 

[Megabyte]

I think he has a 2-stroke and if so, fugheddabout replacing any fuel pump until it needs it.

I also have a 2-stroke, and I can say from experience that when the low pressure pumps start to go, it is a gradual thing.
Performance starts to go away as the diaphragms begin to leak. The motor will 'cough' at idle when cold, and fixing the issue is simple.
The low pressure pumps are about $35 each (my motor has 3), so replacing them every 3 years isn't a deal breaker.
Better to be proactive, especially if they have never been replaced.

 

[DaleH]

Damn Yummies .... NO other Mfg'r puts one on a darn 2-stroke ...

 

[Megabyte]

Can't speak to the carbed motors, but the FI motors have them. :wink:

 

[miky2884]

Yes low pressure fuel pumps definitely. I changed mine this spring and I saw a big performance difference this year. 2 stroke ox66

 

[warthog5]

Damn Yummies .... NO other Mfg'r puts one on a darn 2-stroke ...

That '95 250 Yamaha [carb] had one of the fuel pumps go bad. We replaced all 3. 1 fuel pump per carb.

 

[jr]

Thanks guys. It is a 2 stroke, guess I should have noted that. I did the thermostat last year. I'll check on the water pump when I speak to the guy. Sounds like I should do the low pressure fuel pumps. I will admit it has been a little rough at idle and tough to start but I just figured it was because of the low use. Thanks
again for the advice.

 

[Megabyte]

When the t-stats were done, was the poppit replaced as well?
Both should be done in tandem.

 

[Brent]

from SIM HT site
http://www.thehulltruth.com/shipyard-is ... nance.html