what is wrong with 1988 88spl

[tjr]

The motor runs fine on muffs,but when i drop it in the water it will not run or idle unless at full throttle. motor was in shop two months ago to rebuld and replace carbs and was given a good bill of health. I just ran a compression check.<br />top left 120, top right 120, bottom left 120, bottom right 110. If i play with throttle and bump it into gear and hit the gas it will run fine. what is going on? Has new plugs gappede at .040.<br /><br />Thanks <br />Tom

 

[DJ]

Re: what is wrong with 1988 88spl

tjr,<br /><br />When running on the muffs, disable one cylinder at a time by disconnecting a plug wire at a time (do this with insulated pliers/rag, etc) and see which ones do not effect it's running.<br /><br />Also, watch the timing plate under the flywheel, as you advance the throttle. Does it nmove smoothly?