wernerml
Member
Sorry to start another thread about starter problems but I'm stumped.
Rebuilt my 787 last year. Ran it for 5~6 hours of break in ( had a couple of nice days in October) then put it away for the winter. Brought the new battery inside for the winter and put it on a trickle charger once a month for a day or so.
This spring it wouldn't start. Starter engages but engine won't spin. Removed the plugs and sprayed oil all over the place. Spun the engine with the starter quite a bit and got it all cleaned up. Put pinchers on the oil lines to the rotary shaft to keep the oil from coming back while I'm trouble shooting.
Engine continues to crank strong when plugs are out. Sometimes it will crank with the plugs in (seems to be just after topping up the charge on the battery??) Most often it won't. Sometimes for seemingly no reason it will crank when I try, Bendix is working fine. Had the head off, pistons and cylinders look fine very little oil residue on the top end. I have used a little starter fluid and have gotten it to chug and spit a bit.
Took the starter off and opened it up. Cleaned out the carbon and cleaned between the copper pads of the commutator brushes looked ok. Put it back together. Maybe is slightly better but still often won't crank.
Today cleaned the ends of all the cables for starter power. Checked they are tight. Tried to smash the crimps a bit. Put some "No-Corrode" on them and put it all back together. Same crap.
Swapped battery with the one from my Wrangler. Same issue. Got out my fancy volt meter. Measuring my Jeep battery I get 12.5V idle and 9.8V while attempting to crank. Bendix engaged, engine not turning. Using my Marine battery (675 CA) 13.0V and 10.2V while attempting to crank.
I think my next step is to replace all the battery / Starter cables. I have tried to measure voltage at the starter lug and I am getting numbers like 7.5V. I have ruled out the starter solenoid.
If the cables don't solve the problem I guess I am in the market for a new starter. Starting to tick me off since it is now Mid July and no boating yet this year.
Rebuilt my 787 last year. Ran it for 5~6 hours of break in ( had a couple of nice days in October) then put it away for the winter. Brought the new battery inside for the winter and put it on a trickle charger once a month for a day or so.
This spring it wouldn't start. Starter engages but engine won't spin. Removed the plugs and sprayed oil all over the place. Spun the engine with the starter quite a bit and got it all cleaned up. Put pinchers on the oil lines to the rotary shaft to keep the oil from coming back while I'm trouble shooting.
Engine continues to crank strong when plugs are out. Sometimes it will crank with the plugs in (seems to be just after topping up the charge on the battery??) Most often it won't. Sometimes for seemingly no reason it will crank when I try, Bendix is working fine. Had the head off, pistons and cylinders look fine very little oil residue on the top end. I have used a little starter fluid and have gotten it to chug and spit a bit.
Took the starter off and opened it up. Cleaned out the carbon and cleaned between the copper pads of the commutator brushes looked ok. Put it back together. Maybe is slightly better but still often won't crank.
Today cleaned the ends of all the cables for starter power. Checked they are tight. Tried to smash the crimps a bit. Put some "No-Corrode" on them and put it all back together. Same crap.
Swapped battery with the one from my Wrangler. Same issue. Got out my fancy volt meter. Measuring my Jeep battery I get 12.5V idle and 9.8V while attempting to crank. Bendix engaged, engine not turning. Using my Marine battery (675 CA) 13.0V and 10.2V while attempting to crank.
I think my next step is to replace all the battery / Starter cables. I have tried to measure voltage at the starter lug and I am getting numbers like 7.5V. I have ruled out the starter solenoid.
If the cables don't solve the problem I guess I am in the market for a new starter. Starting to tick me off since it is now Mid July and no boating yet this year.