I've read in the stickies and done some searching on compression tests, I know that the ignition needs to be disabled during this.
I plan on warming the engine up, pulling the plugs & taking them out of the wires, then attaching the gauge to each cylinder and cranking it with the key, but how do I ground the coil/distributor wire? I'd like to not goof anything up!

Sorry to request a step by step but I'm not clear on the disabling of the ignition.

Boat is an 84 searay seville.

Thanks in advance!

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Anyone in the north central MA or in the south central NH area know of any reputable independent marine mechanic?
I don't want to pay a marina.

I am going through my boat and I have the exhaust manifold off, the out drive off. I am looking to flush the motor out to assure the water ways are clean and clear. any help or suggestions would be greatly appreciated

I just picked up this boat and the po said he thought it needed a jasco pump now that confuses me because it is freshwater cooled I'm kinda new to a system like this so please bear with me

i got a 88 chevy 5.7 and i just did a tune up new wires, plugs and cap kit..... i removed the wires without marking or anything cuz the cap has the numbers maked and i just used the cap number with the intake firing order... my problem is that the motor wants to start but its back firing out the carb... i already removed number one plug put it to tdc on comperssion stroke and then timed the dizzy, so why is it still back firing???

I have a issue on my boat let me start. Last year I started my boat in the river and the grass clogged up the water inlet and burnt up the water impeller and overheated the motor so took the outdrive off and cleaned all the rubber pieces out and replaced the water impeller and took the boat back out and it didn't seem to run right it had a mis too it. So I parked the boat for the winter and just now started it back up for the summer and same problem with missing. I did some troubleshooting and found that #1 &#3 cyclinders on the port side are not firing. I swapped plug wires, took the manifold off and removed the valve cover and everything looks and functions fine. I took both spark plugs out and left them in the wire and both are getting spark when turning the motor over but it don't seem like the cyclinders are not getting any fuel. I'm going to get new points and cap tomorrow to see if that helps.

If anybody has any clue or suggestions I can try please let me know.

Just wondering, if exhaust bellows can cause a waterleak into the bildge?

took the starter cause it was making these really laud noise almost like i was over turning the key n saw the cracks i tested the starter n it tested good im really curious that why it crack...Silicone you can c on 1 of the pics was there thinking previous owner silicone it...IMG_1031.jpgIMG_1035.jpgIMG_1036.jpgIMG_1038.jpg

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i am re -installing my outdrive-87 cobra, and noticed the 2 new o-rings that came with the gasket kit seemed much smaller than what is on the shaft now. i know they will stretch but doesn't seem like they should have to that much-what do they seal anyway and if the old ones appear in good condition, am i hurting anything by re-using the old ones?

I honestly didn't even know my boat had this part until I fired it up for the 1st time of the season and water sprayed out of it. Definitely would help if the manual listed draining this part in the winterization section. I am looking for a replacement part for it but I can't spare THE $400 that the dealer is asking for it. Does anyone know where I can find an aftermarket cooler? Thanks for the help!

Hi Guys! I've posted here before and you've all helped so much, so to begin...thank you. Also, I want to say I've scanned the forums and looked for a similar problem to mine, and have found a few similar but nothing quite the same, so I decided to post. Here goes:

1990 Four Winns OMC Cobra 5.0 HO

Let me try and explain the issue I've been having, and then I'll tell you how I've tried to fix it.

I get out to the lake and my boat fires right up! Its a beautiful thing. No issues at all. I can run the boat at WOT all day. She purrs like a champ! After running her for 15 maybe 20 minutes or so, I decide to go to the beach, or whatever, and I shut the boat off. When I go to restart the boat, she will fire right up no problem, run for a short while (I mean like 100 yards or less) and then die. I can not get it started after this!

Here are some of the things I've done: I replaced the anti-siphon valve. I've replaced the fuel filter (fuel/water separator). Also, and this may be quite interesting, after the boat died, I pulled the fuel filter to check it, and it is only 1/2 full! I'm assuming (and PLEASE correct me if I'm wrong here) that means that when I shut the boat off, the fuel system is losing pressure and subsiding back into the tank. I dont see any signs of gas in the bildge or anywhere else. If the system WERE NOT losing vacuum pressure, the fuel filter should still be full, right? I'm also assuming that the reason the boat runs shortly after being turned off, is there is still gas in the Carb bowl.

As a test, I eliminated the fuel filter from the system because after the boat would die, I mechanically pumped fuel through the lines with a hand pump-ball. It seemed to lose pressure at the fuel filter. Based on my test, and eliminating the fuel filter, the boat seemed to perform just fine. Since my fuel filter is BRAND NEW, I assume that the bracket holding the filter must have some sort of crack in it allowing air into the system?

Here is what I cant figure out though, and this really trips me up. Even if I lost pressure in the fuel system when I shut the boat off, why isnt my fuel pump bringing the gas back up when I try to start the boat? The fuel pump is new and replaced just last year!

More questions/mysteries to me: isnt the whole purpose of the anti-siphon valve to not allow gas to fall back into the tank? Could I have put the wrong valve on when I replaced it two weeks ago? It screwed in just right. Could this problem be caused by a clogged gas tank vent line? Could this be caused by a bad fuel pick-up in the tank?

Remember, the boat will run juuuuuuust fine all day as long as you dont shut it off. Its only when I shut it off.

Anyway, all the help I can get is greatly appreciated, and if you have more questions to help you try and solve the problem, please ask away!

what i believe is my starter bad i turn the key today for the first time since last year n these loud noise almost sounded like i was over turning my ignition n not letting go since i was by myself i couldnt really ear point where the noise was coming from exact but im almost sure the loud grinding noise came from the starter Can a bad starter make the load noise i describe?? engine is an omc 120hp sterndrive thanks for any help..

Does anyone have any tricks to get the shift cable through the intermidiate housing.

'85 Series 400, 3.0L in my Capri.

Randomly while cruising the engine will drop RPM and stumble like when the electric shift assist is making the ignition miss while shifting (switches were properly adjusted and not pressed when shifted in gear). I disconnected the 4 pin connector and its run fine since but shifting is a little difficult and I'm sure its hard on the cable.

Do I need to replace the electrical module:

OMC Cobra Stringer 120 140 2 5 3 0 Litre Shift Assist Module | eBay

or do I need to replace the switches on the shift converter?

I recently purchased a 1991 Reinell 192 rml. I was surprised to see it had points as i was troubleshooting it. After a good tune up, it would not run. Each time i turned the key, it sounded healthy and willing but would not stay running. I troubleshooted it some more to find low voltage at the coil. 4 to 5 volts is all it has. I ran a jumper wire to the coil and it ran like a top. The ignition switch tested good so now what? Does the throttle and shift assembly contain the issue? There is some type of module at the linkage by the carb and 2 switches on the throttle linkage. I would also like to know where i can find a manual for this thing.
Any help would be appreciated.