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    merc 350 engine problems need input

    I was on the lake today, and it was running great. Stopped for some grub, then an hour later left and no waked it for about 5 min. Hammered down and bang bang bang. Pulled off cyl. 3 wire from dist. and it goes away. Sounds like something is banging by the intake. I had 20 miles to get...
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    Merc 350 I/o hard starting when cold

    my engine starts hard when cold. it has a clear glass fuel filter mounted next to the carb, and its dry, then from cranking it builds fuel again, and eventually starts. What causes the fuel to go recede??
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    prop clicking in forward

    i just put a pre alpha on my chris craft, that had an alpha gen 1 on it. Both outdrives from 350 motors. it is solid in reverse, but in forward I can spin the prop by hand and hear a clicking sound. With it running it spins normal. I just feel that in the water it will slip? What should...
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    prop shaft seal alpha 1 gen 1

    I need to replace the prop shaft seal on my alpha 1 gen 1, as fishing line ate through it. It was leaking fluid and when I took off the prop it was melted into fishing line and completely detached. What do i need to do to replace that seal??? It's an o ring that goes around the prop shaft...
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    benefits from points to electronic ign.

    I have a 23 chris craft with a built merc. 350 And my Thunderbolt module went bad, so i swapped in the pionts setup from my other boat. it seems to run fine, is there a big difference in the ignitions????? I found on craigslist 2 thunderbolt modules for 45.00 ea. So I bought...
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    white smoke or steam from exhaust

    I took by boat out today for the first time after dropping a 283 in my 1983 Chris Craft, it has through hull exhaust. Temp gauge showed 150 degrees, but I noticed water(normal) and steam or white smoke also coming from the pipes. Is this normal??? 90 degree day, humid Boat ran great...
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    Thunderbolt IV problems

    I have a 1983 Chris Craft with a merc 350 and thunderbolt IV ignition. The motor is built a little bit, and I lost spark yesterday I have checked everything, even bought a new electronic sensor for 95 dollars and still no spark at the coil I now believe the module wet bad. I swapped...
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    Merc manifold and riser questions

    I'm putting my motor back together and I took the risers off the manifolds, to clean off the gaskets. I wire wheeled everything, And i'm wondering if i need to put gaskets back in between, or can I use like a permetex product??
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    chevy 350 swap to 283?

    I bought a boat that threw a rod, then didn't get winterized and also cracked the block. I have the opportunity to get a built 283 with 202 heads, roller rockers, and accelerator intake. It's and 1960's motor, but looks awesome. Is this a dirrect swap? will my marine components just swap...
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    pre alpha and alpha gen 1 question

    I have two boats a 1982 wellcraft with twin 350's and pre alphas the other is a 1983 chris craft with alpha one gen 1. will the whole pre alpha swap onto the chris craft?? or will the lower, lower units swap. The alpha lower is shot and i'm looking for a cheap fix til i can get a new...
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    82' 350 merc. rebuild questions

    I'm rebuilding my 1982 merc. 260's (chevy 350s) For my 30' wellcraft. I have the motors out and torn down, and would like to do some performance mods and need suggestions. I would like to get closer to 300 hp out of them. 1. intake replacement? what kind? 2. Cam replacement? 3. gear drive...
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    performance speed question

    I just purchased a 1982 wellcraft 260 express cruiser with twin merc 260's meaning twin 350 motors I pulled both motors to rebuild as one had a knock in the bottom end. I was wondering if anyone had a clue as to the estimated speed of this boat. its 26 foot long with a 10' beam and 7,000 lbs...
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    Performance question

    I just purchased a 1982 wellcraft 260 express cruiser with twin merc 260's meaning twin 350 motors I pulled both motors to rebuild as one had a knock in the bottom end. I was wondering if anyone had a clue as to the estimated speed of this boat. its 26 foot long with a 10' beam and...
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    merc 350 engine removal question

    I have a 1982 26 foot wellcraft cruiser. One of the motors has a knock in the bottom end, so i am pulling both to rebuild them. Today I disconnected everything, and pulled the manifolds off. my question is I pulled the motor mounts on either side, and two bolts in the back that hold the...
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    Can you start thr motor with outdrice off?

    Call me stupid, but I'm fairly new and still learning. I pulled the lower units to rebuild. I still wanted to fog the motor can I still start it with the outdrive off. I already know about cooling meaning there will be none.
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    Another question Standard or reverse rotation motor

    I have another question. replacing the port side motor. And is there standard or reverse rotation?? Both motors look the same and the starters are both on the starboard side. They look the same excapt on has the power steeering. The outdrives also look the same, where as the props both...
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    Newbie mercuiser 260 hp engine swap question

    I just purshased a 1983 wellcraft with twin engines and the port side motor has a knock in the bottom. I am looking to swap the motor. Looking to get a truck motor. What motor should I look for????? I already know i need to put in brass freeze plugs and swap everything over from...
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    Need prop help 1970 OMC outdrive v8

    I have a 1970 slickcraft that I just purchase it has omc and the guy said a 350 motor 235hp? It all looks original. I nicked the prop and want a spare what do i need?? part#? pitch? Im lost. I see a lot of props but i dont know what to look for. Any help would be grateful....
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    Boat steers hard right. Need input

    I just got my first boat and put a 1990 force 90 on it and its running great,but it wants to steer hard right. I centered the motor on the transom and the only thing i can think of is the little I guess you would call trim tab right above the prop that looks adjustable back and forth would that...
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    Force 90 powerhead removal question

    Im going to start to remove my powerhead this weekend due to low compression on one cyl. Head gasket let go and washed out a cylinder. I have the clymers manual and it talks about a flywheel puller is there a another way?? And any other tips that may be helpful.
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