if u r a boat mechanic please explain

[spareparts]

do a compresion test on your 4 cylinder, if its fair, pull the head, have it gone thru and freshend. Have the machine shop install the rocker arm up grades. try compition cams magnum rockers, they are cheaper than full roller and far better than what you have, you may have to install big block chevy rockers and studs. DO a search for cheap 460 ford rockers, a whole bunch of different ideas came up. Put it all back together with the stock 2bbl set up and try it out. At teh very least, you will have a good motor to sel if you want more power. My old roomate had a 17 Stingray owrider. I did a few minor mods to the 3.7 2bbl motor he had. Teh boat would run 55 mph with alight load. We used to pull two wake boards all teh time with four peopl in the boat. Don't give uyp on that four cylinder, its a good powerful motor. Easier to fix what you have than start a new

[aussie]

well thamnls spares just dont want to go the wrong way about it

i have to options buy that 302 windsor of ebay and hope it fits without too much trouble and rebuild it first

the next one is buy a edelbrock preformer head with the larger chambers fit the rollers and head comes complete with studs and rollers i was going to go for a 1.8 rocker arm and mod the manifold for a 600 cfm vac look may even pull the engine down and rering ti and get the cam ground to a mild solid but will it all be worth it in the end

i dont mind if i have to spend money in the end it will be a better boat it working out which way to go

[step up here]

larger head chamber makes for lower compression ratio without the proper pistons. look just get a nos kit. you want power . power you will have doubled. but if abused you wont have any motor left.

[aussie]

Originally Posted by step up here

larger head chamber makes for lower compression ratio without the proper pistons. look just get a nos kit. you want power . power you will have doubled. but if abused you wont have any motor left.

thats not the advice im looking for what r all u guys going to start being dicks now

[aussie]

http://www.youtube.com/watch?v=ldeUvKat94Y

[spareparts]

good info on here
http://www.jalopyjournal.com/forum/s...ght=mercruiser

and here
http://bpi.ebasicpower.com/c/MER6A/3...for+Mercruiser

[aussie]

well i decided to do the 3.7 up watching some heads on ebay us the guy said he can post them for $175 so i will go the full hog do what ever it needs rebore . balance... rollers . mild solid regrind .timing chain. speedy sleve on camshaft . head stud kit..cut intake and fit 4 barrell plate..get dizzy recurved...fit a air fuel ratio gauge to get the mixtures right...electronic kit..solid lifter..3/8 pushrods...the heads need no work new well i have to buy 2 just thinking if i can enlarge the exhaust outlet on the transome....and too i may run it on a engine dyno to get a horse power and tork reading my mate said he will do it so when i have it done ill post some stuff well i better get of of here and start making some cash and i mite see if i can get rid of that harmonic balancer and find something better well cheers for now

ill post some pics of the engine when its appart if u like