1971 100 hp Starflite - service

[pitprice]

I have just received a new amp and coil which will hopefully fix the no spark problem i have been having.

I do not however want to give this a try just yet as i would like to fix whatever problem will have be causing the amp to blow in the first place. I have had the boat around 4 months and it was pretty negelected before then. I don't want to blow the brand new amp again.

Could anyone give me an idea of what i need to do in order to service the engine properly to get her up and running smoothly.

I would like to pull the flywheel off and check the points gap as i have read this could have caused the amp to blow. Can anyone tell me what the points gap should be and is this a very difficult job? And also should i check what the spark gap should be for the spark plugs?

Changing the gear lube. I know these electric shift gears need Premium blend or Type C lube but i am struggling to find any here in New Zealand. I have removed what looked like the drain plugs for the lower gears but only a very small amount of cream coloured thick liquid dribbled out. Do i have the right area and its just that the lube has run low? Is there a trick to getting the lube in and how much do i need, as it looks like it could be tricky without some special tools.




Did i need to change the impeller as well? I have heard this should be done but it might be a bit of a complicated job and parts are scarce this side of the world. I had to get the amp/coil sent in from the US.

Is there anything else i should be looking at?

I have a few questions about props as well but i think i'll try and get this up and running nicely before i get too complicated as i don't know too much about boats.

Cheers
Chris

 

[F_R]

Re: 1971 100 hp Starflite - service

I have just received a new amp and coil which will hopefully fix the no spark problem i have been having.

I do not however want to give this a try just yet as i would like to fix whatever problem will have be causing the amp to blow in the first place. I have had the boat around 4 months and it was pretty negelected before then. I don't want to blow the brand new amp again.

Could anyone give me an idea of what i need to do in order to service the engine properly to get her up and running smoothly.

I would like to pull the flywheel off and check the points gap as i have read this could have caused the amp to blow. Can anyone tell me what the points gap should be and is this a very difficult job? And also should i check what the spark gap should be for the spark plugs?

Changing the gear lube. I know these electric shift gears need Premium blend or Type C lube but i am struggling to find any here in New Zealand. I have removed what looked like the drain plugs for the lower gears but only a very small amount of cream coloured thick liquid dribbled out. Do i have the right area and its just that the lube has run low? Is there a trick to getting the lube in and how much do i need, as it looks like it could be tricky without some special tools.

View attachment 46661


Did i need to change the impeller as well? I have heard this should be done but it might be a bit of a complicated job and parts are scarce this side of the world. I had to get the amp/coil sent in from the US.

Is there anything else i should be looking at?

I have a few questions about props as well but i think i'll try and get this up and running nicely before i get too complicated as i don't know too much about boats.

Cheers
Chris

Points won't blow an amplifier. Loose and or dirty/corroded connections will, especially the battery cables. Jump starting can do it too. Disconnecting a battery cable while running is forbidden.

In an emergency, (and it sounds like you have one) Dexron Automatic Transmission fluid can be used. I assume you have that stuff there. You pump it in the drain hole till it comes out the top hole, then put the top plug in to air lock it so you can remove the pump from the bottom hole without it all gushing out. By "pump" a large pump type oiler can will work, or they make small hand pumps for outboard oil bottles too. Surely you have outboards in New Zealand. They all need oil fills.

Points gap is .010" Plug gap is .030" to .040", using L77JC4 or QL77JC4 plugs. You have them there???

 

[CharlieB]

Re: 1971 100 hp Starflite - service

The J/E 'Amp' is the earliest known 'dwell stretcher' used to extend dwell time and 'amplify' current rise time in a coil.

These WILL over heat and die if the key is turned ON and left ON to operate a radio or other accessory that SHOULD have been wired into an Accessory terminal instead of an ignition.



The presence of "cream coloured thick liquid" in your gearcase is cause for suspicion that a seal may be leaking.

TEST the case with a small hand pump/vacuum kit, 7 PSI for 7 minutes then retest at 7 inches vacuum for 7 minutes, if EITHER test fails you should replace the seals, order a lower unit seal kit.

While you have the gearcase off for rebuild/resealing, replace the impeller, if the stainless cup or lower plate have a 'line' worn into them from the center section of the impeller rubbing against them , then replace those stainless parts also.