Recent content by hn2704

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    Where to get interrupt/overstroke switches for 1987 OMC cobra?

    My interrupt and overstroke switches on my 87 OMC Cobra with GM 350 engine sometimes get stuck and the engine runs rough Where can I find those switches? Are they sold individually or I have to buy the whole assembly? Thanks
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    timing way too retarded at high rpm. 1987 OMC cobra GM 350

    I set the initial timing on my 87 OMC GM 350 with point ignition to 9 BTDC at 600rpm. However, at 2000 rpm the timing is way retarded ~40 ATDC. I see lots of white smoke at the exhaust and smell gas at high rpm. I guess that because of the ignition is too late and the unburned gas escaped...
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    Where to buy water pump/alternator/power steering pump belt for OMC cobra V8 1987

    I need to buy a new set of belt for my GM 1987 V8 5.7L (water pump/alternator and water pump/power steering pump)but can't seem to find them in auto part store. I tried ebasicpower.com and iboat store but can't find any. can anyone give me some pointers: where to buy? generic part number?can I...
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    Differences between 86 an 87 OMC cobra?

    Is there any difference between a 86 and 87 OMC cobra stern drive? What about engine? I have a 87 OMC cobra and want to buy a OMC service manual but can only find 1986 manual. Will it be accurate for my boat? Thanks
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    OMC Hi Vis substitution for 86 OMC cobra drive??

    Hi, Is there any substitution for OMC Hi Vis oil for Cobra sterndrive that I can get from a local auto part store? What about oil for tilt/trim system? Thanks
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    Weak spark on GM 350 with new coil

    Hi, I just replaced the ignition coil and rotor, breaker, condenser on my GM350 engine. When I check the spark coming out of the coil, the spark is still weak: purple, short spark. What could be the problem? Also, sometimes, the engine would start up easily and run for 15" and the and could not...
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    oil pressure and fuel pump?

    I am rebuilding my engine and have no oil pressure. How do I check the oil sensor to make sure it's not broken? I have no oil leak. My V8 GMC 5.7L has an upgraded electric fuel pump and now there's a hole on the engine block where the original mechanical pump was . Do I need to plug it. Will it...
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    Need recommendation for a decent VHF radio

    Hi, I am looking for a VHF radio for my 19" bayliner for mostly near shore boating fishing. What would you recommend for a decent one for less than $200? I'm checking the Uniden UM525 or Oceanus. are they any good? What about antenna? Is Shakespeare 5101 any good? Thanks in advance
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    Replacing OMC chevy 350 block?

    I'm replacing my cracked OMC Chevy 350 block. The casting number is 10054727. A local guy have a 350 block with casting number 14093638 (with 2 bolt main, roller cam). Here's the info from Mortec: 10054727...350...86-up...2 or 4...one piece rear seal, some "Made in Canada"...
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    How do I check my engine year?

    I need to buy a new engine for my boat. How can I check the engine year and model without removing it from the boat? Can I tell from the block casting? I need to know if it's 1 or 2-piece rear main seal. Thanks
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    Good place for OMC 5.0L engine part

    Hi, I'm in the process of rebuilding my 1986 OMC/Chevy 5.0L engine and need to order some parts. Can you recommend some places with a large inventory so I can order all I need in one place? Thanks
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    Mercruiser 262 175HP replacing OMC Cobra?

    Hi, I'm totally new to boating. I was given a Bayliner Capri 1986 with a OMC Cobra 5.0 inboard/outboard engine. I was told the the block was cracked due to improper winterizing. I want to replace the complete engine with a rebuilt Mercruiser 1987 4.3L 175HP . Will the engine fit the outboard...
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