crossflow decarb starboard lower piston

[crazy charlie]

Hi guys,the motor is an 84 115 rude.the problem is 115 readings in three out of four cyls.The starboard lower cyl is only about 25.It is a shock to me with the care i take of the motor.Never run hard,never even ran warm.the idle was low one day so assuming it was time for a carb rebuild,I did a comp test first.I was stunned.The motor runs fine with a higher idle and when on plane the power seem to be the same as always.I am going to try a decarb on the low cyl as suggested by a member and want to know which side of the carb to spray in to target that cyl.Someone mentioned that these carbs are crossflow???? Charlie

 

[The Marine Doctor]

Re: crossflow decarb starboard lower piston

If your compression is 25psi on one cyl..remove the head of that cyl and have a look.<br /><br />TMD

 

[jim dozier]

Re: crossflow decarb starboard lower piston

You can also squirt some directly into the offending cylinder through the spark plug hole and let it sit awhile.

 

[crazy charlie]

Re: crossflow decarb starboard lower piston

Thanks guys.I appreciate the offer Marine doctor and I will probably have to take you up on it.I was prepared to remove the head,but I thought I would try the decarb first in case I broke any bolts,a few of them are a little rusty.Good or bad idea??? Charlie

 

[Hooty]

Re: crossflow decarb starboard lower piston

Good idea.<br /><br />c/6<br />Hooty