Printable View
#1 105lbs, #3 100lbs, #5 95lbs, #2 100lbs, #4 100lbs, #6 95lbs
Looking a buying a boat with this motor not been ran but maybe 1-2 the past two years. Is is compression low, or is this ok for this motor. May need a good carb flush or somthing like that. Any help would be great.
Thanks
[QUOTE=BigB;355320]#1 105lbs, #3 100lbs, #5 95lbs, #2 100lbs, #4 100lbs, #6 95lbs
Looking a buying a boat with this motor not been ran but maybe 1-2 the past two years. Is is compression low, or is this ok for this motor. May need a good carb flush or somthing like that. Any help would be great.
Thanks[/QUOTE]
I'd recommend a couple things: Either:
a. Make the sale conditional on the engine passing an inspection within 7 days of purchase, and get that signed in writing......or
b. Request the motor be check at a dealer of your choice prior to the sale, and that if it passes you will pay some portion (maybe half, or all, or none) of the inspection cost.
General info that may help:
Compression is the heart of an outboard. If one or more cylinders are damaged due to improper timing settings, lean fuel condition, overheating, or stuck rings from carbon buildup, your outboard is about to become history. Does a compression test alone always determine that my outboard is in good shape? Suprisingly the answer is "no". A good compression reading does not completely determine internal conditions. To correctly diagnose condition of pistons, rings, and cylinders, a leakdown test should also be performed. Using a quality leakdown tester, each cylinder should not show more than 10% loss. If any do, there is certain to be an internal problem in the making. [B][U]For example, a compression reading of 120 lbs would be viewed upon as a good cylinder by the average person. This may or may not be the case. If a leakdown test of the same cylinder indicates say...20% to 25% or more leakage, it would be a good bet that excessive wear, scored cylinder, the cylinder scratched, and/or the rings stuck or damaged in a way that does not show up with a simple compression check. In any case, wear or damage is present and advisedly requires attention before further damage and/or exceptionally poor performance and efficiency results. Most common effects from diagnosis of excessive leakdown would be in the idle range of the motor.[/U][/B] If compression check shows more than 15 lbs difference on any given cylinder from highest reading of other cylinder/s, or if leakdown test shows excessive loss, you have a problem in the making! DO NOT continue running the motor until problem is diagnosed and repaired! It could result in causing much more internal damage than you already have.