1990 GT No Compression

[SaltyDog251]

Hi everyone,

I just bought a 90 GT from the original owner. It's been in freshwater only and he told me it needs a top end and the price was great so I bought it.

I'm a decent mechanic but know nothing about these old yellow engines. Are they worth doing a top end on or should I just get a rebuilt and be done with it?

Any input is greatly appreciated!

 

[Dr Honda]

it's a 26 year old engine. There's no way the lower is still going to be good, if the top melted down. It's a full rebuild.

 

[SaltyDog251]

thanks

Any idea how to get the exhaust out? I have it loose but it's like a Rubik's cube trying to get it out!

 

[SaltyDog251]

Ok, I got the pipe out and pulled the head and cylinders to take a look. One piston came apart a fine bit and the other one looks good. I'm thinking I might need to check and see if my compression tester is accurate. The bottom end actually looks good and feels tight.

Who sells rebuilt yellow 587 engines?

 

[LouDoo]

This just came up yesterday from one of our most respected members. [MENTION=51824]Matt Braley[/MENTION]

http://www.seadooforum.com/showthread.php?80706-New-SBT-587-No-Core-Needed

Lou

 

[Ankeneyou]

This is the order I would consider personally if i needed a rebuild. Only based on reviews from other members though.

1 fullboreonline.com
2. Seadooengineshop.com
3. Shopsbt.com

The first two will rebuild your engine, so longer turn around. You can do an exchange with SBT but may end up with someone else's salt water rebuild.



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[SaltyDog251]

Thanks guys
I ordered one from SBT first thing today

Should I go with the premixed oil and fuel from now on?

 

[SaltyDog251]

I found out why the piston went bad. The previous owner had a transom drain plug in the oil fill tank and got water in the oil.

Maybe I'll just flush the oil system and add new oil and keep the pump system operational

 

[benjilafouine]

There is also this place I heard of from a mechanics:

http://www.cvtech-aab.com/en/

They have offices in Canada and the US.

Benji.

 

[RodInEscondido]

Thanks guys
I ordered one from SBT first thing today

Should I go with the premixed oil and fuel from now on?

Majority of experts here recommend sticking with oil injection. Seems there is a oil pump test procedure in the service manual.