Starting to wonder about this 9.5

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floatingwoody2006

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Feb 2, 2006
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Had it out on the water for a couple hours today, and it seems to run ok, but not perfect. I am familiar with the typical exhause leaks on them, and that's what i believe is causing the occasional "sneezing" but otherwise, does run ok. I was adjusting the carb while underway to see if i could even it up a bit. When it started bogging at the end after i got the carb as close as it liked it, i gave the fuel bulb a squeeze to see if it may be the pump, but all that did was stall it out. Is that supposed to happen? if i squeeze would it actually flood it? It has a fresh carb cleaning done correctly, and all electrical is fine. Im starting to dislike the motor, but another is not an option at this time. It did re-start so i could get back to shore. Thanks. oh.. And i have heard some people drill some small holes in the cowling and that helps a bit.. Where would be the best location to drill these? Thanka again.
 
asdasc

asdasc

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Re: Starting to wonder about this 9.5

I would run it without the cowl first as a test to see if that is really the issue. It is a simple test, and I would hate to ruin a good cowl needlessly.
 
iwombat

iwombat

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Re: Starting to wonder about this 9.5

A squeeze stalling it out indicates your float valve is not seating properly.

That sneezing, if it persists after fixing your float valve, is most likely caused by an ignition problem. What is the condition of your coils and plug wires?
 
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ezeke

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Re: Starting to wonder about this 9.5

If squeezing the bulb caused it to stall, you have the carburetor float needle not working correctly. Fuel will enter the carburetor body from pressure you create rather than being pulled through the carburetor by the engine as it should.

Squeezing the bulb should only fill the float bowl - the rising float then pushes the needle upward to block any addittional fuel until the engine pulls some out and drops the float again.

Sneezing is usually a sign of running lean - air leak or your lean rich setting is too tight. It could also be that your high speed jet is clogged - that's a common problem when you don't use a fuel filter.
 
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floatingwoody2006

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Re: Starting to wonder about this 9.5

iwombat said:
A squeeze stalling it out indicates your float valve is not seating properly.
Click to expand...

That's what i was thinking as well, but it's just so hard to believe..I have done several and triple checked this one. Brand new kit, air, and spray cleaner. that could explain the slight surging as well. I plan on taking this boat 300 miles north in 2 weeks, and across a 14 mile lake. It needs to be right. Ill see if i can re-create the issue in a barrel. FUnny thing is though, it never runs perfectly, but i have trolled 2 plus hours with it twice now, and it does like to run. Smooths out at almost 1/2 throttle and runs as it should.

Edit.. Sneezes just a bit at rich or lean.. That's why i was thinking it was eating a bit of exhaust..
 
iwombat

iwombat

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Re: Starting to wonder about this 9.5

Another more remote possibility is a torn diaphragm in your fuel pump. A squeeze could load up the top (?) cylinder through the pulse line.
 
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floatingwoody2006

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Feb 2, 2006
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Re: Starting to wonder about this 9.5

The manual says the fuel pumps cannot be re-built, but a new replacement is 91 dollars..Can just the diaphram be replaced?
 
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F_R

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Jul 7, 2006
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28,226
Re: Starting to wonder about this 9.5

Sneezing means it is too lean. Exhaust smoke leaks make it too rich. So, that is not the problem.

I don't remember reading that you have checked the carburetor synchronization with the spark (link & sync). If not correct, that will mess it up at speeds just off idle.

EDIT: I just realized that you are working on a 1964. You said that you trolled for quite awhile with it. That alone is a good sign. Fact is, the 1964 and 1965 models did not run very well, even when brand new. Hate to say it, but you probably are not going to get it much better. The problem with them was they shook so badly that the carburetor didn't work well, and worse than that, instead of the flywheel carrying it over compression, the powerhead just moved away from it. The problem was fixed with the 1966 models by installing vibration dampers at both sides of the powerhead to hold it more or less still. They can be put on a 1964, but requires much work and parts.
 
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