I sold out

roffey · #1 08-16-2013, 11:36 PM

OK so I sold out. I sold my 26 ft Wellcraft. I am not worthy, I do not own a Wellcraft. I figured how to make a cruiser go 50 mph, sell it and buy a new one, LOL.
So.. I sold my old boat and bought a new to me boat and lost $1000 in the process. My new (to me) boat is a pristine condition Thunder Craft with a 3.7 ltr and it goes like stink. With just me in the boat, I can just touch 55 mph. So here is my question, I have a 4 cylinder 3.7. WOT is almost 5k, is my prop wrong. Should I have a steeper pitch and bring down RPM?

smokeonthewater · #2 08-17-2013, 12:11 AM

55 w a 3.7?..... must be a 10' boat

roffey · #3 08-17-2013, 07:39 AM

Quote:

Originally Posted by smokeonthewater

55 w a 3.7?..... must be a 10' boat

It's a 17.5 ft 188 hp (488r). I can put the boat on and off the trailer my self. I was going to repower my Wellcraft.. but as I said I sold out. I do not have the skill sets to pull the motor and my friends thought it was to big a job... so here I sit. 55 mph is a little to fast for me but it is nice to have the hammer to drop with the wife in the boat. She gives me $hit every time I do it and it is a blast.

roffey · #4 08-17-2013, 07:40 AM

I'll post pics as soon as I can. I know it's not a Wellcraft, but it's still a boat.

spareparts · #5 08-17-2013, 08:46 AM

those 488's are pretty powerful for a 4 cylinder engine. Search on here about 3.7L engines, they have a few quirks and issues you need to be aware of, beyond that, they work pretty good. What kind of prop are you running? Those engines respond well to large blade surface props like mercury Mirage. I'd try to get it down a little rpm, the valve train doesn't like 5000

charlie_the_tuna · #6 08-17-2013, 11:00 AM

maybe you should go ask the guys on the thunder craft site.

roffey · #7 08-17-2013, 02:26 PM

Quote:

Originally Posted by spareparts

those 488's are pretty powerful for a 4 cylinder engine. Search on here about 3.7L engines, they have a few quirks and issues you need to be aware of, beyond that, they work pretty good. What kind of prop are you running? Those engines respond well to large blade surface props like mercury Mirage. I'd try to get it down a little rpm, the valve train doesn't like 5000

I thought the RPM was a little high. It has a spare prop I might try.