1998 Supra Comp

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10-11-2019, 07:06 AM
BillyBrad

1998 Supra Comp

I purchased a few weeks ago. Fair to Good condition. Have spent many hours cleaning hull and Cleaner wax above the water line. Interior was covered by a boat cover that leaked over a period of 2 years. Some of the vinyl on the seats has black spots I can't get off...Any suggestions??? I took it out for my First Run yesterday. Top speed was 35mph, Is that normal ? Indmar V-8. I want to restore this boat for my Grandchildren and teach them to ski while I still have my health at 70. Thanks for your consideration folks
10-11-2019, 10:49 AM
crystal waters

Quote:

Originally Posted by BillyBrad

I purchased a few weeks ago. Fair to Good condition. Have spent many hours cleaning hull and Cleaner wax above the water line. Interior was covered by a boat cover that leaked over a period of 2 years. Some of the vinyl on the seats has black spots I can't get off...Any suggestions??? I took it out for my First Run yesterday. Top speed was 35mph, Is that normal ? Indman V-8. Iwant to restore this boat for my Grandchildren and teach them to ski while I still have my health at 70. Thanks for your consideration folks

Should be able to achieve approx 44 to 45 mph.
Your engine is an Indmar .
10-12-2019, 12:26 AM
BillyBrad

Thank You for the reply....Could it be the prop? Tuning? carb? engine sounds good. Wonder what to check out 1st etc?
10-12-2019, 05:43 PM
crystal waters

Quote:

Originally Posted by BillyBrad

Thank You for the reply....Could it be the prop? Tuning? carb? engine sounds good. Wonder what to check out 1st etc?

Do a compression test on all eight cylinders first!
All of your suggestions are valid ones.
Unless you are a good mechanic take it to a reputable marine shop and let them run through the gauntlet for you.
Could be a combination of things .
Good luck!
10-13-2019, 08:02 PM
BillyBrad

Thanks Again ….Compression check...Coming UP!!!
10-15-2019, 11:17 AM
crystal waters

Quote:

Originally Posted by BillyBrad

Thanks Again ….Compression check...Coming UP!!!

Assuming your compression test checks out ok, then you need to chase the cause for your slow speeds compared to normal.
You can spend a lot of money chasing potential causes on your own .
Go to a reputable marine shop and let them do it for you.
Could actually save you dollars in the long run.
10-18-2019, 07:50 AM
Wickliffe

I'm guessing there are a lot of suspects with an issue like this?