60 Hp compression readings

[koolerb]

Re: 60 Hp compression readings

Just knocked out SB#2276R1. Not too bad, took about twenty minutes. I'm not sure if I'm going to do 2271 or not. Talking to my local mechanic, he's concerned about an overly rich mixture leading to excessive carbon build up. He's arguing that the people that were overheating motors were probably pushing them too hard. 60hp motors on 20ft pontoon boats. etc.

 

[dafox99]

Re: 60 Hp compression readings

I'd be interested in the expert's opinion on that one. As long as the intake is in the water, and the motor is propped for the load (not over, or under-revving), can you work it too hard? I'm thinking parts and surfaces will wear more quickly if the motor is at WOT constantly, but I wouldn't think it would overheat.

 

[rodbolt]

Re: 60 Hp compression readings

davef<br /> I tend to agree<br /> if its propped correctly and all the subsystems are in good working order I cant see the load as the major problem. I see 40 HP motors on 24-26 ft toons all the time. while they are underpowered they work everyday.<br /> if the mix is so overly rich as to cause an excessive carbon build up you will have drivability issues. I am more concerned with a slightly lean condion causing piston failure. if you have to err, err on the rich side. thats why they make ring free and carbon guard

 

[koolerb]

Re: 60 Hp compression readings

I'll probably end up ordering the kit, just to be on the safe side. Have any of you seen an engine that's had this kit installed? The easiest way I can determine if 2271 has already been completed on my engine would be from the info on the max spark advance sticker included with the kit. My plugs look good; I'm hoping one of the previous owners already completed this SB.