No tilt, no trim, best prop?

[paulsboats]

Jack that up a few holes at least!I had mine hanging that low and it was like i was dragging an anchor.I had a 17 pitch alum prop to start ,was a pretty scary hole shot!Couldnt think of putting the hammer down.I went right to a omc 23 sst,hole shot wasnt so great. then i raised the engine 3 inches and hold on!A 19 sst would be good for your boat.

 

[atc250r]

Where do you think his propshaft centerline should be Paul? You have yours set up and running well so you probably have about the best idea.

 

[Helderp]

Jack that up a few holes at least!I had mine hanging that low and it was like i was dragging an anchor.I had a 17 pitch alum prop to start ,was a pretty scary hole shot!Couldnt think of putting the hammer down.I went right to a omc 23 sst,hole shot wasnt so great. then i raised the engine 3 inches and hold on!A 19 sst would be good for your boat.

That will be my project for next weekend to move the engine up 2-3 holes.

I plan to use the boat all day today; and since I have some serious hole shot, I'm going to move the trim pin up one or two and see how it does. I'll let you guys know how it went when I get back. Thanks again!

 

[paulsboats]

Where do you think his propshaft centerline should be Paul? You have yours set up and running well so you probably have about the best idea.

i would think around 2.5- 3 inches.but not with that prop.the rpms sound very low using a 15 pitch prop to me.

 

[Helderp]

i would think around 2.5- 3 inches.but not with that prop.the rpms sound very low using a 15 pitch prop to me.

Yea, I think WOT is 5500 RPM for this engine, not sure why it only turns 5100. I Don't think this engine had the right plugs in it since it calls for QL 77JC4 and it had UL 77V in it . I just got back from Westmarine with the correct plugs, Gapping at .30 and will install them after I seafoam. I'm thinking new plugs and seafoam might help.

 

[atc250r]

Sounds like a good start and then we can get your prop centerline in the right spot.

 

[Helderp]

Was actually getting 5200 before, after seafoam and new plugs and going up two pins on the trim, I got 45MPH on the GPS.. 5600.. Good start, 50's not that
far away. time for a new prop!

 

[atc250r]

Sounds like a plan. I would raise the motor on the transom and go for a ride and see where it puts you. You may need to go up to an even steeper prop than you think you do right now.

 

[paulsboats]

Should run around 5800 w.o.t. ,if you raise it up on transom and put a nice prop on i bet youll see 55-60 mph.

 

[paulsboats]

Jack that up a few holes at least!I had mine hanging that low and it was like i was dragging an anchor.I had a 17 pitch alum prop to start ,was a pretty scary hole shot!Couldnt think of putting the hammer down.I went right to a omc 23 sst,hole shot wasnt so great. then i raised the engine 3 inches and hold on!A 19 sst would be good for your boat.

A 19 sst would be good for your boat. I have one used in nice shape.

 

[Helderp]

A 19 sst would be good for your boat. I have one used in nice shape.

Wow, just got home after a full 9 hour day, most of it running, and after a few beers and allot of Florida sun. the boat still has a hole shot from hell, not much changed but I picked up 3 mph with out loosing any hole shot. thanks to all who have inputted, I'm feeling inspired by this 37 year old engine. She didn't miss a beat.

Paul PM me some pics of that prop... Thanks again!

 

[atc250r]

Bringing the motor up some will help the holeshot too.

 

[paulsboats]

Bringing the motor up some will help the holeshot too.

will help on fuel consumption,steering will be easier