I just "inherited" a 1961 16' Seaswirl with a 1964 60 hp Mont. Ward/Gale/Johnson engine. Never had a boat before. Been lurking for two weeks, and got a ton of info from all the other posts.
Every now and then the prior owner had sprayed WD-40 into whatever looked like it needed oil. Brought it home, worked the pull start to make sure it wasn't frozen, then took it down to the river - and - the darned thing started and ran pretty darned good. 20-25 mph, quite a bit of smoke.
Only problem is that when punching the throttle, it doesn't want to get up and go. Leave it WOT for 30-60 seconds, and it will start running like a top.
Two weeks later, I have resealed the lower unit, new impeller, rebuilt the carb, points, condenser, new plugs, plug wires, fuel pump, pint of Seafoam in 6 gallons of gas.
Then thought I should probably check compression. Warmed up engine, pulled and tested one plug at a time, got 65 psi +/- the width of the needle on all four cylinders. Did not have throttle wide open, but not sure if that would push it up to 100psi+.
Questions: Is that a reasonable compression reading? Can a ring job be done by a novice mechanic? Is the engine worth doing that much work on?
Also need to clarify mix ratio - originally said 24:1, but many posts say it is ok to use 50:1, I split the differance and am running about 32:1. What is best for these motors?
Every now and then the prior owner had sprayed WD-40 into whatever looked like it needed oil. Brought it home, worked the pull start to make sure it wasn't frozen, then took it down to the river - and - the darned thing started and ran pretty darned good. 20-25 mph, quite a bit of smoke.
Only problem is that when punching the throttle, it doesn't want to get up and go. Leave it WOT for 30-60 seconds, and it will start running like a top.
Two weeks later, I have resealed the lower unit, new impeller, rebuilt the carb, points, condenser, new plugs, plug wires, fuel pump, pint of Seafoam in 6 gallons of gas.
Then thought I should probably check compression. Warmed up engine, pulled and tested one plug at a time, got 65 psi +/- the width of the needle on all four cylinders. Did not have throttle wide open, but not sure if that would push it up to 100psi+.
Questions: Is that a reasonable compression reading? Can a ring job be done by a novice mechanic? Is the engine worth doing that much work on?
Also need to clarify mix ratio - originally said 24:1, but many posts say it is ok to use 50:1, I split the differance and am running about 32:1. What is best for these motors?
Last edited: