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Ask Dominick Your Own Question
Dominick, Marine Mechanic
Category: Boat
Satisfied Customers: 1009
Experience:  25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified
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I have a 1980s Yamaha wave blaster. Bought it used, ran it

Customer Question

I have a 1980s Yamaha wave blaster. Bought it used, ran it several times on the hose in
the drive way, not yet in the lake. Now iy turns over but doesn't start
Submitted: 8 months ago.
Category: Boat
Expert:  RSRBOB replied 8 months ago.

Hi and thank you for your question.

First, Yamaha didn't start making water vehicles until 1989. The first year of the Wave Blaster was 1993. If we need to get too specific, I will need to know what you really have as far as Make, Model and Year.

However, there are some generics we can check in the mean time.

First, what do the spark plugs look like when you take them out? Does the tip have heavy carbon deposits? Is it black and oily? Does it seem to be damp with gas? What do you see on the spark plugs after trying to start it?

Next, have you done a compression test? If not, you need to do that now. To do a compression test, only pull one spark plug at a time, and make sure you ground the spark plug leads appropriately. Usually the best thing to do is use the one spark plug you removed and put it back in the plug cap and lay it on the head, then use an extra spark plug for the other spark plug lead and ground it to the head.

Let me know what you see on the spark plugs and what you get for a compression test.


Customer: replied 8 months ago.
Not sure how to do a compression test
Expert:  RSRBOB replied 8 months ago.

Very easy. Get a compression tester. Remove one spark plug and ground both spark plug leads as outlined above. Screw in the compression tester. Hold the throttle wide open, crank the engine and stop when the gauge needle stops climbing. Test both cylinders.

Customer: replied 8 months ago.
Ok, I wont be back there by the wave blaster so let me due the compression test and get back to you
Customer: replied 8 months ago.
On Friday
Expert:  RSRBOB replied 8 months ago.

Super, when you do get back to it, double check the make model and year for me. If you aren't sure, you can give me the VIN inside the engine compartment or the HIN which is on the back of the hull.


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