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Forum: Engines 08-28-2013, 09:59 PM
Replies: 32
Views: 11,036
Posted By mmwjr
Sounds like you have done all the right things. I...

Sounds like you have done all the right things. I am at a lose on what to tell you to do next. Sudden increase in rpms with no increase in speed sounds like caviatation. Maybe time to get a mechanic...
Forum: Engines 08-28-2013, 06:22 PM
Replies: 32
Views: 11,036
Posted By mmwjr
And this is with both engines? Not sure...

And this is with both engines?

Not sure what a common source would be other than bad fuel (have you removed one of the water seperators and dumped the contents into a glass jar to look for...
Forum: Engines 08-28-2013, 11:47 AM
Replies: 32
Views: 11,036
Posted By mmwjr
BTY you mentioned barrnicals on the drivers, how...

BTY you mentioned barrnicals on the drivers, how about the hull?
Forum: Engines 08-28-2013, 11:44 AM
Replies: 32
Views: 11,036
Posted By mmwjr
Well with only a 400 rpm increase and no rubber...

Well with only a 400 rpm increase and no rubber smeel in the engine compartment I don't think it's a coupler, plus you said both engines are doing it. I am going with cavitation the question is the...
Forum: Engines 08-28-2013, 12:21 AM
Replies: 32
Views: 11,036
Posted By mmwjr
Sorry kind of forgot what all we discussed. Are...

Sorry kind of forgot what all we discussed. Are the rpms increasing or decreasing? Do you hear a change in the engine pitch (noise level) and does the boat speed quickly change?
Forum: Engines 08-27-2013, 10:12 PM
Replies: 32
Views: 11,036
Posted By mmwjr
OK coupler and prop hubs are OK. With only losing...

OK coupler and prop hubs are OK. With only losing 400 rpm sounds like it may be the props slipping in the water, loosing their bite. Does this only happen under certain conditions or all the time?...
Forum: Engines 07-31-2013, 01:04 AM
Replies: 32
Views: 11,036
Posted By mmwjr
Ua punch and mark the nut thte prop hub to see if...

Ua punch and mark the nut thte prop hub to see if they stay aligned.

BTY the picture of he V6's show the raw water pump on the lower left front of he engine, a sure sign they aconnected to bravo's...
Forum: Engines 07-30-2013, 10:29 PM
Replies: 32
Views: 11,036
Posted By mmwjr
You need to look at the back of the engine where...

You need to look at the back of the engine where the coupler is for signs of rubber that would indicate the coupler is shot. Do you have spare props to but on to see the problem goes away? Other than...
Forum: Engines 07-30-2013, 11:43 AM
Replies: 32
Views: 11,036
Posted By mmwjr
I have never heard of V6's in a 3000 scr nor have...

I have never heard of V6's in a 3000 scr nor have I heard ov V6's with BII's.

Painter is dead on regarding the coupler.

The coupler is there to protect the engine incase the outdrive were to...
Forum: Engines 07-29-2013, 10:24 PM
Replies: 32
Views: 11,036
Posted By mmwjr
Yep either hub or coupler. I spent $150 5 years...

Yep either hub or coupler. I spent $150 5 years ago having a new hub installed but that included a complete prop check as well. Blades were in good shape no nicks.
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