servicing 30hp yamaha 2 stroke

[gavinc400]

just after a few tips on servicing my boat motor do i change the plug every time i do a service,
also do they normally have a air filter you have to clean????
ok this is what i do now i grease the motor spray the motor with wd40 and check gear box oil and change the oil .
so is there any thing i have missed.
thanks gav

[robothefisho]

Impellor? Good idea to change the plugs anyway, they're only $4. Clean the carbies. The list goes on. No airfilters.

[gavinc400]

thanks mate i just need to buy a torque wench now .
i have bad images of my mate changing a spark plug and over tighting
it and striping all the tread .
so what do i have to do with the impeller

[=Wookie=]

The impeller is a component of the water pump that gets water round your engine, it is made of rubber and degrades. The impeller needs to be replaced on a regular basis. I suggest you grab the service manual for your outboard and have a good read, pick a digital version up on ebay or readmanual.com.

[Steeler]

Like the others have said the impeller is vital, without a healthy one the rest of the engine could end up being a over sized mantle piece.

Steeler

[gavinc400]

ok thanks guys i will replace this impeller.
so from what info you have gave me you should change the impeller,plugs,gear oil,grease up the motor parts hope i haven"t missed any thing and service every 10 hours of running time???

[Steeler]

I just do mine every spring,but very much worthwhile to give her a run regularly even on the muffs.But certainly pulling your plug occasionally will give you a good idea on how its running ie rich,lean.

Steeler

[cormorant]

Every year or as per the manual if you do more hours than 100.

WD40 can affect the rubber on plug leads , electrics and cowl and leaves them greasy. There is special under cowl sprays and just rinsing with warm soapy water gets rid of the salt crystals. Some people use teh lanoline based ones

Remove the prop and check behind it for fishing line and any seal damage , regrease spline shaft and replace prop. Grease pivot points, linkages. and flush or replace fuel filter if it has oneand carby bowl if it has one. Annodes should be removed , cleaned and replaced if erroded significantly.

Seriously look in your manual or download one which will show you all teh jobs to do on minor annual services .

If it is a 2 stroke it may be worth doing a decarb once a season depending on what quality oils and fuels you use.

Nothing is real hard to do but it is all worth doing properly and well worth the one off expense of the service manual to get it all right.

ther eis plenty of info on the net with people utubing their service of impellers etc to give you an idea. Plenty easy to stuff it up if you haven;t seen it done befpre or aren't good on teh tools. IF you have amate who is good on teh tools and experienced in outboards get him to show you teh ropes or if local to a decent mechanic pay himand watch so you pick it up gradually.