I have a 19’ proline 1990 model with a 150 yamaha 2stroke and some kind of steel prop that is stamped with 17-m. Can anyone here tell me or point me in the right direction to pinpoint why I am not getting more than 4200 rpms out of the engine. The boat is very sluggish out of the hole and will only run about 33mph at wide open throttle. Any help is greatly appreciated. The boat is center console if that matters. Everyone I have talked to says that it should be running between 4500 and 5500 rpms. Thanks again.
call hankel marine they have always been very helpful and had answers
1996 Key West Sportsman
112 Johnson
I had an issue with my control cables being stretched and not being about to get above 2000 RPMs wouldn’t even plane out, just replaced them, check those and problem fixed along with some new controls (they were messed up too), take your “cowel” off and see if you can manually rev your engine without the use of the controls and see if that is your issue, whens the last time you replaced them, rather reasonable fix if you do it yourself, run anywhere from $40-60 replacing both. If that’s your issue. Shoot me a PM
Bragging may not bring happiness,
but no man having caught a large fish,
goes home through the alley.
-Anonymous
Is hankel the one in mount pleasant? Thank you for the recommendations
How long have u had it? Make sure it isn’t holding water
sounds like you have a motor issue, not a prop issue
the motor should be turning 5500rpms, and a 19 proline with a 150 yamaha 2 stroke should easily turn a 17 pitch prop 5500rpms
have you had a compression and spark check done?
2 things I would do right off the bat. Push your throttle all the way to WOT (with the engine off) and take the cowl off and see if you can manually push the linkage any more open. If so it sounds like adjustment is off or the cables are stretched.
Second, I would take the prop off and have the actual pitch measured. That or find the proper part # to look up the pitch. You can only diagnose an engine running issue once you have all of the info in hand.
This is where you go for all your prop issues.
I live with fear everday, and sometimes she lets me go fishing
Done the spark check, waiting on the compression tester to show up. I have only had it for a few months and have had it on the water a few times and each time out I have somebody go to wide open throttle while I look in the bilgenwith a flashlight and have never had any water run out when I pull the plug before leaving the landing
What kind of compression should I be looking for?
The rule of thumb is 100+ psi with no more than 15% difference between cylinders. Someone correct me if I’m wrong on this.
2007 Scout 221 150 Yamaha 4 stroke
A compression check isn’t going to do you any good unless you verify the butterflies are wide open at WOT. That should be your first test in the yard. Then warm the engine, cut it off and do a compression check on each cylinder with the throttle wide open. You would hope for over 100 psi, but I would focus more on the overall #'s. You really only want 10% difference on each cylinder.
geronimo
its a 2stroke
the butterflys dont have to be open to test compression on a 2stroke, it wont hurt, but its not necessary
with the compression test, we arent looking for anything specific or even precise, i just want to make sure he has adequate compression on all cylinders before looking for another problem
Okay, did the spark check again-all cylinders are firing
did a compression test, got anywhere from 115psi-120psi on all cylinders
Talked to three different prop shops online and they all say inhave a 17 pitch prop and that should be the right prop. But how does ptop diameter effect how the boat drives/ handles? And at wide open throttle, I can move the throttle linkage by hand but only about 1/16".
Okay, did the spark check again-all cylinders are firing
did a compression test, got anywhere from 115psi-120psi on all cylinders
Talked to three different prop shops online and they all say inhave a 17 pitch prop and that should be the right prop. But how does ptop diameter effect how the boat drives/ handles?
still sounds like a power issue, not a prop, first guess would be a fuel issue, like maybe dirty carbs
I agree. Everything sounds right, and that prop should be perfect. Dirty carbs will sometimes idle fine, and rev up great, but under load will only be pumping like 50% fuel. Your engine sounds starved. If you don’t want to pay to remove the carbs you can try a bottle of Quicksilver fuel treatment. The really strong stuff that cost about $20 bottle. I put about a full bottle in 15 gallons of gas and run that through. It will sometimes free up a sticky carb.
we’ve all gotten used to the reliability of fuel injection, people forget that a “major tune up” on a carb two stroke engine, usually included rebuilding the carbs. Its a common issue, if it hasn’t been done int eh past few years, have the carbs gone thru
Yep. Well I guess I get to meet Chris v. tomorrow. Yea. I am getting real tired of spending money on something I have only had in the water a few times, but, I only have myself to blame (long story) .
quote:
Originally posted by SlosirYep. Well I guess I get to meet Chris v. tomorrow. Yea. I am getting real tired of spending money on something I have only had in the water a few times, but, I only have myself to blame (long story) .
Welcome to owning a boat!! Deffinately see Chris V he will lead you in the right direction.
I think everyone on this forum knows what B.O.A.T. stands for. Welcome to the addiction and congrats on your new hole in the water.