Vovlo AQ 125A maxes out on acceleration

dexterm16

Cadet
Joined
Aug 13, 2012
Messages
10
After replacing the timing belt on my motor i had the boat out to test. The motor seems to run just fine now however i cannot seem to get it to go past about 10mph. I had the boat under throttle and heard a sort of a pop noise from the engine compartment. I later examined and determined that one of my 6 bolts from the crankshaft was missing and that may have flew off during it running. From that point on i cannot seem to get it to go faster than 10 mph. I use to get it to 25-30mph with not problem. I do know that i have a leak in my sea water pump and need to replace the gasket and the impeller. When i accelerate i notice that i hit a sort of a plateau with accelerating and once i get to a certain point i notice no difference in speed or RPM . I first thought it was my shift cable but it seems to rev high past my plateau when running on land. Then i thought it was over heating because of the leaky gasket and worn impeller. I also wonder if my water pump is not pumping water to the exchanger to goo things as well.Any suggestions?
 

rav221

Seaman Apprentice
Joined
Jul 18, 2012
Messages
31
Re: Vovlo AQ 125A maxes out on acceleration

I would double check engine timing. Timing can cause those "flat" spots in engine performance.
 

dexterm16

Cadet
Joined
Aug 13, 2012
Messages
10
Re: Vovlo AQ 125A maxes out on acceleration

if the engine was off time then would it start ?
 

rav221

Seaman Apprentice
Joined
Jul 18, 2012
Messages
31
Re: Vovlo AQ 125A maxes out on acceleration

When you change a timing belt, always make sure that the timing is tweaked afterwards using a timing light. Installing a new belt can significantly throw off the timing. It's an easy adjustment, just need the timing light and timing specifications. Yes, the boat will start and even sound decent with the timing off.
 

cr2k

Captain
Joined
Mar 19, 2009
Messages
3,730
Re: Vovlo AQ 125A maxes out on acceleration

10* btdc
 
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